The experience of determining the basic characteristics of solar cells is to understand and master its characteristics and associated measurement methods through the measurement of the basic characteristics of solar cells, and through it has an influence on various optoelectronic devices. which are increasingly used. Get a deeper, more complete understanding.
Improve the traditional experiment of "measuring the volt-ampere characteristics of solar cells", use an optical power meter and a color filter to quantitatively analyze the effects of different effects. >light intensities< Strong >The changes in the characteristic parameters of solar cells under irradiation and under light irradiation with different cutoff wavelengths, and measure the band gap of semiconductor materials.
Experimental content :
Roughly measure the open circuit voltage and short circuit current of the solar cell.
Measure the volt-ampere characteristics of the solar cell when forward biased without light conditions.
Choose a suitable measuring range and carefully measure the direct voltage characteristics of the solar cell.
Use the measured data to plot the I~V curve, check the empirical formula between the forward bias voltage and the current of the solar cell in the absence of light, and calculate the n value.
Measure the charging characteristics of the solar cell without adding bias and with 1000Lux illumination.
Draw the circuit diagram used for the measurement.
When both ends of the solar cell are open circuit, measure its open circuit voltage.
When both ends of the solar cell are short-circuited, measure the coshort circuit current.
Measure the relationship between the output voltage of the solar cell and the output current under different loads R and calculate the corresponding power P.
Measure the lighting characteristics of the cells solar.
Measure the relationship between the short-circuit current and the intensity of the light beam incident on the solar cell.
Measure the relationship between the open circuit voltage and the intensity of the light beam incident on the solar cell.
Measurement of the response function of solar cells and the bandgap.
Rational use of light sources (incandescent lamps and mercury lamps) and color filters (band-pass filters and high-pass cutoffs) are used to design measurement plans.
Make a solar water heater? : Materials needed: box (must have a lid, can be a shoe box), plastic bottle(maybe a can), foam, aluminum foil? (Science There is a school bag), transparent plastic paper and black paint.
Experimental Steps: 1 Use a knife to cut a small hole in the lid of the can that is about the same size as the body of the bottle.
2 Open the lid of the can, fill it with foam and try to cover almost half of the bottle (to keep it warm). Put the bottle back and secure it. (Remember to fill with water)
3. Use black paint to paint the inside and outside of the box black (? to facilitate light absorption)
4. Stick the plastic film on the space cut with the knife (? to avoid air loss)
Make a support behind the 5 small boxes
Solar energy is finished!
Heating and insulation measures:
The bottle can change angle and be perpendicular tou sun. Do you need to support the bottle? Use aluminum foil on the back to reflect light. (It is best to conduct experiments in a warm environment)